A wish of good luck?

My boyfriend today well now ex is a manager at his job and it was his day off. I went by to grab a bite to eat but he was there walking with another coworker pretty closely and then looked up seen me and I was in such shock. I called him because from where I was i couldn't get to him. He said he was wishing a coworker good luck on a test. How do I need to take it because apparently my action was a over reaction on his part that he seen nothing wrong. Do I need to let him go or what?

A wish of good luck?
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